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Measuring Some Vintage Speakers

bconline

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Joined
Nov 29, 2023
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I thought this group would be interested in how some vintage speakers compare to each other under the same measuring conditions. I have a collection of vintage speakers and simple measuring setup. No Klippel machine for me! I measured the frequency response of each speaker with:
  • Laptop PC with Creative soundcard
  • REW software
  • Dayton UMM-6 microphone, with calibration loaded in REW
  • Random Denon amplifier
  • 1 meter distance, on the tweeter axis
  • 20x24 garage with hard floor and 9.5' ceiling
  • Small amount of damping on the floor
All of the measurement suffer from a floor bounce dip at ~80-90hz depending on the height of the woofer and mic. Sorry about that.

Here's the setup.
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Here's the collection.
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Here's all the graphs together. I'll post each frequency response curve separately.
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This one is an MLTL that I built using the Mark Audio Alpair 10.2 full range driver. Remarkable bass from a 4.5" driver. However, the driver has a peak at ~8khz. The measurement also suffers from more floor/ceiling bounce problems due to the high mounted "woofer". I use this set daily with DSP to even out the in-room response.

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This one is a true classic - Yamaha NS1000M studio monitor from the 1970's and '80's. Most known for its 3.5" beryllium dome midrange and matching beryllium dome tweeter. Very crisp and clear, but a bit shy on bass. I thought about extending the cabinet and porting it, but didn't want to cut up this nice pair.

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